Closure for metal drums or the like



July 25, 1933. B. P 1,919,597

CLOSURE FOR METAL DRUMS OR THE LIKE Filed Aug. 14, 1951 ERNEST- BERTRAM POKE- M gaze/ ar MAW ' the corresponding lug or stud of the lower part of the cap,the washer of leather or Patented July 25, 1933 fUNITEDSTATES ERNEST :snn'rmivi POKE, or m alti es INDIA I CLOSURE r03 METAL nnur'lis 03.121111. LIKE.

Application filed August 14, 11931. sea-a m... 556,985.; i

This invention relates to an improved closure for metal drums or l1ke containers of petrol, oil and similar substances and has for its object to provide'a strong and leak proof closure at an economlcal cost.

According to the invention the closurecomp'rises a bung or socket secured to the inside of one end of the drum the socket being preferably made of cast iron and welded in position and has a cap fitted with a washer which covers overand closes the hole in the socket.

The socket is of fiat cylindrical shape with an open end having anouter flange bywhich V it is secured to the inner face of the container. The other end of the socket is cast with a hole and a ring shaped flange or lip the inner face of whichois faced. Thetop inner periphery of the socket is screwthreaded (standard gas, right hand threads) to receive the closure cap which is screwthrcaded to correspond on its outer periphery. V

The cap is made of two parts, the upper and larger part is screw-threaded to engage,

the socket and is bored centrally on its lower face and screw-threaded therein to receive other suitable material is slotted centrally and held between these two parts, thecentral lower part of the cap projects or is extended to form a nut so as to ensure it being screwed tightly in position by means of a spanner.

The upper part of the cap has on its outer face a square recess to ensure it being screwed tightly into the socket by a suitably shaped spanner or key when the cap is screwed into the socket tightly (for it J must be screwed in as tightly as possible) the leather washer becomes squeezed or compresssd between the cap and the lip of the socket wall, thus making a joint which will only allow liquids orgas to pass it under .BIlOIl'IlOUS pressure. r

This action is aided by the fact that the lower part of the cap also compresses the leather washer against the upper part of the cap and the lower part of the cap just below the washer is designed to fit with aslittle clearance-as possible'into the hole in the socket,'leav1nga clearance of'say of an inchwhich is so small-that it"reducesthe 1 1 pressure of the liquid' io r gas at the joints" t0 the absolute minimum? The ca -when in position is made tosc'rew j into the-socket with its outer .face'leve'l-wi-th;

or slightly below the surface of the cohtainer so as to avoid damage to the closure inv r transit. 1

'The invention is more particularly illustrated in the accompanyingdrawing in which Fig. l is a sectional View of the cap in position in the socket. Q Y 4 Figs. 2 and 3 are sectional views of the socket and cap respectively.

Referring to the drawing The socket '1 which is of flat cylindrical shape having an outer flange 2 by which 70.

end of the socket is cast with a central hole i 7 its periphery which engagethe screw-threads v 'on the socket. The upper surface 7A of the part 7 has a sunk recess 10 of square section A by which: thecap can be screwed in tightly by a suitable spanner or key. The lower surface 7B of the part 7 has a screw-thread- T35 ed-recess 11 to accommodate a screw-threadstud 2 of the lower part 8 by" o means of which a disc of leather 13 with a hole punched centrally is tightly secured between the two parts, the leather being of the stme diameter as that of the upper part Y 1 The lower part 8 is also of cylindrical shape made to a diameter very slightly less than the opening 5 in the bottom wall of the socket and has centrally thereon on its lower face a square or hexagon shaped Mg 14: by which it can be turned by a spanner. The. upper surface of the lip 6' is ,faced so that the washer 13 which is secured between it'1 0 and and the lower surface 7B of the part 7.

forms a tight joint. The clearance betweenthe circumference of the part 8 and the hole 5 is small so that there is very little pressure and consequently no leakage at the joint. 7 3

Having now particularly described and ascertained the nature of my said invention and in What manner the same is to be per:

formed I declare that what I claim is 1. A closure for a metal drum havinga threaded socket provided with a bottom lip or shoulder, including atwo part cap'comprising an exteriorly threaded annular mem ber fitting said threaded socket and terminating short ofthe bottom thereof, a compressible washer disposed upon the bottom face of said annularmember adapted to rest upon said bottom lip of the socket,and-a sec ond cap member having both a portionprojectingthrough said washer and secured in saidiannular member andalsoa flange eX-f tending beneath and securing said washer to pressible Washer disposedupon the bottom face of said annular member adapted to rest uponsaid bottom lip of the socket, and

va second cap member detachably secured to said annular member through the central portionof said washer and provided wlth a flan e extendin beneath and SGCHIIIIO said 5% o i o washerto the annular member, which flange is adapted to occupy the hole bounded by said socket lip and to extend to the lower exposed bottom portion of the socket.

ERNEST BERTRAM POKEQ. 

